CN106867077A - A kind of crosslinked polyethylene insulation material and preparation method thereof - Google Patents

A kind of crosslinked polyethylene insulation material and preparation method thereof Download PDF

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Publication number
CN106867077A
CN106867077A CN201710103511.XA CN201710103511A CN106867077A CN 106867077 A CN106867077 A CN 106867077A CN 201710103511 A CN201710103511 A CN 201710103511A CN 106867077 A CN106867077 A CN 106867077A
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China
Prior art keywords
antioxidant
crosslinked polyethylene
insulation material
polyethylene insulation
graphite
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CN201710103511.XA
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Chinese (zh)
Inventor
张城城
王金辉
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Harbin University of Science and Technology
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Harbin University of Science and Technology
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Priority to CN201710103511.XA priority Critical patent/CN106867077A/en
Publication of CN106867077A publication Critical patent/CN106867077A/en
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04Homopolymers or copolymers of ethene
    • C08L23/06Polyethene
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • H01B3/441Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00Specific properties of additives
    • C08K2201/011Nanostructured additives
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/03Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00Properties characterising the ingredient of the composition
    • C08L2207/06Properties of polyethylene
    • C08L2207/066LDPE (radical process)
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2312/00Crosslinking

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Organic Insulating Materials (AREA)

Abstract

The present invention relates to insulating materials field, and in particular to a kind of crosslinked polyethylene insulation material and preparation method thereof.Forced down present invention aim to address existing crosslinked polyethylene insulation material breakdown potential, aging problem easily occurs, proposed a kind of with good breakdown characteristics and anti-aging crosslinked polyethylene insulation material.The present invention takes 100 parts of low density polyethylene (LDPE)s, EVA, nano-graphite, PP, crosslink agent DCP, antioxidant 300, antioxidant 1010, anti-oxidant DLTP, antioxidant 1024, fluorubber masterbatch according to proportioning, by mixing, co-melting, cross-linking reaction, dries prepared crosslinked polyethylene insulation material.Cross-linking polyethylene materials of the invention have superior breakdown characteristics, while having good thermal conductivity again, help to reduce insulating materials operating temperature, extend the materials'use life-span.The present invention is applied to making HVDC transmission line cable.

Description

A kind of crosslinked polyethylene insulation material and preparation method thereof
Technical field
The present invention relates to insulating materials field, and in particular to a kind of crosslinked polyethylene insulation material and preparation method thereof.
Background technology
HVDC transmission line has been widely adopted due to its excellent electric property in long distance powedr transmission, and straight The working field strength that flows power cable insulation is high, insulation thickness is thin, the outside diameter of cable is small, lightweight, current-carrying capacity big, without exchange The advantages such as magnetic field, therefore direct current high tension transmission cable is used as a part indispensable in DC transmission system, is high voltage power transmission In important topic.Start using the initial stage in high voltage direct current cable, it is main to use type cable and oil-filled cable, its Have the disadvantage manufacturing process complexity, high cost, difficult in maintenance.Crosslinked polyethylene (XLPE) insulating high-voltage direct current cable starts within 1999 Using, by its working field strength it is high, insulation thickness is thin, the outside diameter of cable is small, lightweight, manufacture install easily, current-carrying capacity it is big, The advantages of not having the advantage in terms of AC magnetic field, environmental protection is accepted extensively quickly.With Technology of HVDC based Voltage Source Converter increasingly into Ripe, XLPE insulating high-voltage direct current cables in terms of continental Grid of the connection across broad straits except continuing to keep absolute predominance Outward, also to sides such as the land interconnection of asynchronous power network, big city power supply capacity increase, island load power transmission, renewable energy power generation conveyings Application is expanded in face.It was predicted that the voltage class of external high voltage direct current cable XLPE insulating materials will be carried further in the coming years Height, consumption will be significantly increased.At present, XLPE can be applied in the insulation of the cable dry type of basic, normal, high pressure, be finally possible to Full substitution dipping paper cable.
The high voltage direct current cable XLPE insulating materials of current application all remains some shortcomings:First, the generation of space charge And accumulation, when insulated cable uses polymer as insulation, polymer has substantial amounts of localized state, resulting space electricity Lotus effect is embodied in two aspects to insulating barrier internal field, the influence of this internal field:One is electric field distortion effect, is made absolutely Edge layer inside local field strength increases several times;Two is non-electric field distortion effect, i.e. space charge in injected media or with its other party Formula is deposited in media as well, and original localized modes are departed from when there is quick trap, the i.e. space charge of moving back, in quick recombination process, by In the release of big energy, dielectric material will be caused to puncture or dielectric material is produced the localized degradation rows such as electric branch For, it is now recognized that the space charge for reducing and eliminating in insulating materials is the key for developing high voltage direct current cable, particularly when straight During stream cable polarity inversion, local field strength may be caused higher than average field-strength more than ten times, make insulation instantaneous breakdown.Therefore, insulate Material need to have good breakdown characteristics.
Direct current cables insulating materials is chronically under high temperature, working environment, and insulating materials easily occurs degradation phenomena, so that Influence its insulating properties.To delay or suppressing the carrying out of insulating materials oxidizing process, prevent the aging of polymer and extend it to make With the life-span, add antioxidant and prepare upper essential link as direct current cables.But the operation of direct current cables long term high temperature can make Insulating materials is aging, promotes antioxidant to produce inhibition.In process of inhibition, anti-oxidant performance and structure may change Become, and then cable internal electric field is distorted, cause cable to be easier insulation fault.
The content of the invention
Forced down present invention aim to address existing crosslinked polyethylene insulation material breakdown potential, aging problem easily occur, Propose a kind of with good breakdown characteristics and anti-aging crosslinked polyethylene insulation material.
The present invention is adopted the technical scheme that to solve the above problems:The crosslinked polyethylene insulation material presses quality percentage Than being prepared by following components:
The preparation method of crosslinked polyethylene insulation material of the invention, concretely comprises the following steps:
Step 1,100 parts of XLPE, EVA, nano-graphite, PP, crosslink agent DCP, antioxidant 300, antioxidant are taken according to proportioning 1010th, anti-oxidant DLTP, antioxidant 1024, fluorubber masterbatch;
Step 2, by XLPE, EVA, nano-graphite, PP, crosslink agent DCP, antioxidant 300, antioxidant 1010, antioxygen It is uniform that agent DLTP, antioxidant 1024, fluorubber masterbatch are added to stirrer for mixing simultaneously;
Step 3, above-mentioned material is transferred in closed kneading machine, melt blending is carried out at a temperature of 100~120 DEG C;
Step 4, above-mentioned material is transferred in vulcanizing press, cross-linking reaction, 30~60min are carried out at 150~180 DEG C Afterwards, obtain with the addition of the crosslinked polyethylene product of nano-graphite;
Step 5, drying tower will be sucked after products therefrom cooling in step 4,60 DEG C of design temperature takes out after drying 30min.
Beneficial effect:The nano-graphite that the present invention is added in XLPE has the effect for attracting and capturing carrier, can make Carrier is distributed in XLPE and tends to uniform, eliminates space charge, crosslinked polyethylene insulation material of the invention is had good Good breakdown characteristics;Meanwhile, nano-graphite has good thermal conductivity, the heat derives that will can be produced in the course of work, has Help reduce insulating materials operating temperature, extend the materials'use life-span.
Specific embodiment
Specific embodiment one:The crosslinked polyethylene insulation material of present embodiment by mass percentage, by following components Prepare:
Specific embodiment two:The preparation method of the crosslinked polyethylene insulation material of present embodiment, concretely comprises the following steps:
Step 1,100 parts of XLPE, EVA, nano-graphite, PP, crosslink agent DCP, antioxidant 300, antioxidant are taken according to proportioning 1010th, anti-oxidant DLTP, antioxidant 1024, fluorubber masterbatch;
Step 2, by XLPE, EVA, nano-graphite, PP, crosslink agent DCP, antioxidant 300, antioxidant 1010, antioxygen It is uniform that agent DLTP, antioxidant 1024, fluorubber masterbatch are added to stirrer for mixing simultaneously;
Step 3, above-mentioned material is transferred in closed kneading machine, melt blending is carried out at a temperature of 100~120 DEG C;
Step 4, above-mentioned material is transferred in vulcanizing press, cross-linking reaction, 30~60min are carried out at 150~180 DEG C Afterwards, obtain with the addition of the crosslinked polyethylene product of nano-graphite;
Step 5, drying tower will be sucked after products therefrom cooling in step 4,60 DEG C of design temperature takes out after drying 30min.

Claims (2)

1. a kind of crosslinked polyethylene insulation material, it is characterised in that by mass percentage, prepared by following components:
2. the preparation method of crosslinked polyethylene insulation material according to claim 1, it is characterised in that concretely comprise the following steps:
Step 1,100 parts of low density polyethylene (LDPE)s, EVA, nano-graphite, PP, crosslink agent DCP, antioxidant 300, anti-are taken according to proportioning Oxygen agent 1010, anti-oxidant DLTP, antioxidant 1024, fluorubber masterbatch;
Step 2, by XLPE, EVA, nano-graphite, PP, crosslink agent DCP, antioxidant 300, antioxidant 1010, antioxidant It is uniform that DLTP, antioxidant 1024, fluorubber masterbatch are added to stirrer for mixing simultaneously;
Step 3, above-mentioned material is transferred in closed kneading machine, melt blending is carried out at a temperature of 100~120 DEG C;
Step 4, above-mentioned material is transferred in vulcanizing press, cross-linking reaction is carried out at 150~180 DEG C, after 30~60min, obtained To the crosslinked polyethylene product that with the addition of nano-graphite;
Step 5, drying tower will be sucked after products therefrom cooling in step 4,60 DEG C of design temperature takes out after drying 30min.
CN201710103511.XA 2017-02-24 2017-02-24 A kind of crosslinked polyethylene insulation material and preparation method thereof Pending CN106867077A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107915887A (en) * 2017-12-12 2018-04-17 哈尔滨理工大学 Nano-particle dispersiveness modification method in a kind of Polyethylene Nanocomposites
US20220017704A1 (en) * 2020-07-20 2022-01-20 Northwestern University Methods of forming crosslinked polyolefin nanocomposites having high wear resistance

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101418092A (en) * 2008-10-31 2009-04-29 清华大学 Positive temperature coefficient macromolecule composite material for temperature sensing cable and preparation method
CN103965543A (en) * 2014-05-21 2014-08-06 哈尔滨理工大学 Crosslinkable polyethylene insulation material for high-voltage direct-current cable
CN106633303A (en) * 2016-12-21 2017-05-10 西安交通大学 Nano composite crosslinked polyethylene insulating material with high direct current breakdown field strength and preparation method of nano composite crosslinked polyethylene insulating material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101418092A (en) * 2008-10-31 2009-04-29 清华大学 Positive temperature coefficient macromolecule composite material for temperature sensing cable and preparation method
CN103965543A (en) * 2014-05-21 2014-08-06 哈尔滨理工大学 Crosslinkable polyethylene insulation material for high-voltage direct-current cable
CN106633303A (en) * 2016-12-21 2017-05-10 西安交通大学 Nano composite crosslinked polyethylene insulating material with high direct current breakdown field strength and preparation method of nano composite crosslinked polyethylene insulating material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107915887A (en) * 2017-12-12 2018-04-17 哈尔滨理工大学 Nano-particle dispersiveness modification method in a kind of Polyethylene Nanocomposites
US20220017704A1 (en) * 2020-07-20 2022-01-20 Northwestern University Methods of forming crosslinked polyolefin nanocomposites having high wear resistance
US11643511B2 (en) * 2020-07-20 2023-05-09 Northwestern University Methods of forming crosslinked polyolefin nanocomposites having high wear resistance

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Application publication date: 20170620

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